diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 4b3a4ea..c4c33ea 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -180,6 +180,7 @@
 	struct pci_dev *pdev;
 	struct pci_sriov *iov = dev->sriov;
 	int bars = 0;
+	u8 bus;
 
 	if (!nr_virtfn)
 		return 0;
@@ -216,8 +217,10 @@
 	iov->offset = offset;
 	iov->stride = stride;
 
-	if (virtfn_bus(dev, nr_virtfn - 1) > dev->bus->busn_res.end) {
-		dev_err(&dev->dev, "SR-IOV: bus number out of range\n");
+	bus = virtfn_bus(dev, nr_virtfn - 1);
+	if (bus > dev->bus->busn_res.end) {
+		dev_err(&dev->dev, "can't enable %d VFs (bus %02x out of range of %pR)\n",
+			nr_virtfn, bus, &dev->bus->busn_res);
 		return -ENOMEM;
 	}